Can someone please help me?
'MIC 2.9.0 for GIMP 2.10 Snaps Ubuntu Ubuntu 20.04 LTS
I extracted gmic_2.9.0_gimp2.10_ubuntu_focal_amd64 and copied the file gmic_gimp_qt to home/myusername/snap/gimp/252/.config/GIMP/2.10/plug-ins
But that doesn't work

I've tried
sudo add-apt-repository ppa:otto-kesselgulasch/gimp
sudo apt-get update
sudo apt-get install gmic gimp-gmic

Doesn't work

I've checked on Gimp help/plugin-browser G'mic isn't listed there and it doens't show under filter also, and i've restarted my pc a couple of times.

Any help would be apreciated :-)

The situation is with Ubuntu 20.04

The 'snap' version is Gimp 2.10.18 and does not support QT that is why gimp_gmic_qt does not work
The 'flatpak' version also Gimp 2.10.18 and has the same problem.

edit: This is true for any snap or flatpak Gimp These are self-contained 'sandboxed' applications

You can install a regular Gimp 2.10.18 (sudo apt install gimp) That does support QT and the gmic plugin does work. Unfortunately this version does not have python support so none of the usual python plugins work.

There is an 'appimage' here: https://github.com/aferrero2707/gimp-appimage/releases/ that actually comes with gmic pre-installed. (get a with-plugins version) and generally everything works.

Thank you very much for your reply Rich2005, I am a real noob with Linux, I always try to google and solve problems, but this I could not. The 'appimage' does it support python plugins also?

Yes, python plugins are supported. Most things work correctly.

Awesome thanks guys, I've been battling with this for 2-3 days now and I asked on a bunch of Facebook groups and no one could help!